[thunderchildobs]

I have a Canon 550D with a 18-55mm lens with a stabilzer.

When I have the lens set 18mm the auto focus works fine.
When I have the lens set to anywhere from 19mm to 55mm the auto focus fails and keeps searching for focus.

I have a 90-300mm lens and when I attach it the camera, the auto focus works fine.

No error messages are dislayed.

Any suggestions.

Brendan